Usb Application With Usb Suspend/Resume And Ri Function; Airplane Mode - Quectel EG915U-EU Manual

3.2.2.2. USB Application with USB Suspend/Resume and RI Function

If the host supports USB Suspend/Resume, but does not support remote wakeup function, the RI signal is
needed to wake up the host.
The following figure illustrates the connection between the module and the host.
⚫
Sending data to the module through USB will wake up the module.
⚫
When the module has a URC to report, RI signal will wake up the host.
⚫
NOTE
Under Linux OS USB support Suspend, under Windows OS nonsupport Suspend.

3.3. Airplane Mode

When the module enters into airplane mode, the RF function will be disabled, and all AT commands
related to it will be inaccessible. This mode can be set via the following ways.
Hardware：
The W_DISABLE# pin is pulled up by default. Its control function for airplane mode is disabled by default
and AT+QCFG= "airplanecontrol", 1 can be used to enable the function. Driving it low will set the
module enter airplane mode.
EG915U-EU_Hardware_Design
Module
USB_VBUS
USB_DP
USB_DM
AP_READY
MAIN_RI
GND
Figure 5: Sleep Mode Application with RI
LTE Standard Module Series
Host
VDD
USB_DP
USB_DM
GPIO
EINT
GND
29 / 81